<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片视图 -->
    <el-card>
      <!--添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addJsDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!--角色列表区 -->
      <el-table :data="rolelist" border stripe>
        <!--展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>

            <!-- <pre>
            {{ scope.row }}
          </pre
            > -->
          </template>
        </el-table-column>
        <!--索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showJsDialog(scope.row.id)"
              >编辑</el-button
            >
            <!-- 删除按钮 -->
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeJsById(scope.row.id)"
              >删除</el-button
            >
            <!-- 分配权限按钮 -->
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRihtDialogVisible"
      width="50%"
      @close="setRihtDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightlist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRihtDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addJsDialogVisible"
      @close="addDialogClosed"
      width="50%"
    >
      <!-- 内容主体区 -->
      <el-form
        :model="addJs"
        :rules="addJsRules"
        ref="addJsRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addJs.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addJs.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <!-- 底部按钮区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addJsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addJsUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="jsDialogVisible"
      width="50%"
      @close="jsDialogClosed"
    >
      <el-form
        :model="jsForm"
        :rules="jsFormRules"
        ref="jsFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="jsForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="jsForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="jsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="jsUserInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRihtDialogVisible: false,
      // 所有权限的数据
      rightlist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: "",
      // 控制添加角色对话框的显示与隐藏
      addJsDialogVisible: false,
      // 添加角色的表单数据
      addJs: {
        roleName: "",
        roleDesc: "",
      },
      // 添加角色表单的验证规则对象
      addJsRules: {
        roleName: [
          { required: true, message: "请输入角色名", trigger: "blur" },
          {
            min: 3,
            max: 10,
            message: "角色名的长度应在3~10个字符之间",
            trigger: "blur",
          },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
          {
            min: 3,
            max: 15,
            message: "角色描述的长度应在3~15个字符之间",
            trigger: "blur",
          },
        ],
      },
      // 控制修改角色对话框的显示与隐藏
      jsDialogVisible: false,
      // 查询到的角色信息对象
      jsForm: {},
      // 修改表单的验证规则对象
      jsFormRules: {
        roleName: [
          { required: true, message: "请输入角色名", trigger: "blur" },
          {
            min: 3,
            max: 10,
            message: "角色名的长度应在3~10个字符之间",
            trigger: "blur",
          },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述信息", trigger: "blur" },
          {
            min: 3,
            max: 15,
            message: "角色名的长度应在3~15个字符之间",
            trigger: "blur",
          },
        ],
      },
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");

      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }

      this.rolelist = res.data;

      console.log(this.rolelist);
    },
    // 根据Id删除对应权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);

      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消删除，则返回值为字符串 cancel
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );

      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败！");
      }
      this.$message.success("删除权限成功！");
      // this.getRolesList();
      role.children = res.data;
    },
    //监听添加用户对话框的关闭事件
    addDialogClosed() {
      this.$refs.addJsRef.resetFields();
    },
    //点击确定按钮添加新角色
    addJsUser() {
      this.$refs.addJsRef.validate(async (valid) => {
        if (!valid) return;
        //可以发起添加角色的网络请求
        const { data: res } = await this.$http.post("roles", this.addJs);

        if (res.meta.status !== 201) {
          this.$message.error("添加角色失败！");
        }

        this.$message.success("添加角色成功！");
        // 隐藏添加角色对话框
        this.addJsDialogVisible = false;
        this.getRolesList();
      });
    },
    // 展示编辑用户对话框
    async showJsDialog(id) {
      const { data: res } = await this.$http.get("roles/" + id);

      if (res.meta.status !== 200) {
        return this.$message.error("查询角色信息失败！");
      }

      this.jsForm = res.data;
      this.jsDialogVisible = true;
    },
    // 监听修改角色对话框的关闭事件
    jsDialogClosed() {
      this.$refs.jsFormRef.resetFields();
    },
    // 修改角色信息并提交
    jsUserInfo() {
      this.$refs.jsFormRef.validate(async (valid) => {
        // console.log(valid)
        if (!valid) return;
        // 发起修改用户的数据请求
        const { data: res } = await this.$http.put(
          "roles/" + this.jsForm.roleId,
          { roleName: this.jsForm.roleName, roleDesc: this.jsForm.roleDesc }
        );

        if (res.meta.status !== 200) {
          return this.$message.error("更新角色信息失败！");
        }
        this.jsDialogVisible = false;
        this.getRolesList();
        this.$message.success("更新角色信息成功！");
      });
    },
    // 根据id删除对应的角色信息
    async removeJsById(id) {
      // 弹框提示
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);

      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消删除，则返回值为字符串 cancel
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }

      const { data: res } = await this.$http.delete("roles/" + id);

      if (res.meta.status !== 200) {
        return this.$message.error("删除角色失败！");
      }
      this.$message.success("删除角色成功！");
      this.getRolesList();
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败！");
      }

      // 把获取到的数据权限保存到 data 中
      this.rightlist = res.data;
      console.log(this.rightlist);

      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys);

      this.setRihtDialogVisible = true;
    },
    // 通过递归的形式，获取角色下所有三级权限的id,并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包括 children 属性 ，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }

      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框的关闭事件
    setRihtDialogClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];

      const idStr = keys.join(",");

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );

      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败！");
      }
      this.$message.success("分配权限成功！");
      this.getRolesList();
      this.setRihtDialogVisible = false;
    },
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>